Structure and optical properties of LiNbO3:ZnO (3.43–5.84 mol %) crystals
- Authors: Sidorov N.V.1, Teplyakova N.A.1, Yanichev A.A.1, Palatnikov M.N.1, Makarova O.V.1, Aleshina L.A.2, Kadetova A.V.2
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Affiliations:
- Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
- Petrozavodsk State University
- Issue: Vol 53, No 5 (2017)
- Pages: 489-495
- Section: Article
- URL: https://journals.rcsi.science/0020-1685/article/view/158218
- DOI: https://doi.org/10.1134/S002016851705017X
- ID: 158218
Cite item
Abstract
LiNbO3:ZnO (3.43–5.84 mol %) crystals have been studied using Raman spectroscopy and fullprofile analysis of X-ray diffraction data. The results demonstrate that, at ZnO concentrations above 3.95 mol %, their structure is free of NbLi basic defects, which are characteristic of congruent lithium niobate crystals. Increasing the Zn concentration leads to changes in the arrangement of structural units in the cation sublattice along the polar axis and distorts the BO6 (B = Nb, Li, Zn, or a vacancy) oxygen octahedra. In the Raman spectra of the crystals, the width of the line at a frequency of 876 cm–1, which corresponds to stretching modes of the oxygens in the BO6 octahedra, has been shown to increase considerably, which may be due to changes in the character of bonding in the B–O–B bridges in response to changes in the Zn concentration in the crystals. The gradual increase in the electro-optical coefficients of the LiNbO3:ZnO crystals with increasing zinc concentration can be accounted for by changes in the ionic contribution to these bonds.
About the authors
N. V. Sidorov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
Author for correspondence.
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
N. A. Teplyakova
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
A. A. Yanichev
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
M. N. Palatnikov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
O. V. Makarova
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
L. A. Aleshina
Petrozavodsk State University
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Universitetskaya ul. 10a, Petrozavodsk, Karelia, 185910
A. V. Kadetova
Petrozavodsk State University
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Universitetskaya ul. 10a, Petrozavodsk, Karelia, 185910
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